Summary of the dietary intervention studies that were included in the dataset.

Kibble = Complete extruded food; Kibble-P = Complete extruded food + probiotic; Kibble-D0 = complete extruded food without polyphenols; Kibble-D1 = complete extruded food with polyphenols, 1 mg/kg; Kibble-D3 = complete extruded food with polyphenols, 3 mg/kg; Moist-S = complete moist food, with sunflower oil and salmon oil; Moist-H = complete moist food, with hemp oil; Moist-D0 = complete moist food without polyphenols; Moist-D1 = complete moist food with polyphenols, 1 mg/kg; Moist-D3 = complete moist food with polyphenols, 3 mg/kg; Home = home based diet, with raw meat; Base-1 = mixed diet, beef raw meat and complementray vegetable food; Base-2 = mixed diet, beef raw meat and complementray vegetable food; Base-3 = mixed diet, beef raw meat and complementray vegetable food. (XLSX)